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<p>Hydrogen, with its high energy density and sustainability, is a promising energy carrier, and water electrolysis provides an efficient, carbon-free method for its production. To achieve cost-effective hydrogen production, the development of transition metal-based HER catalysts is crucial. In this study, sulfur-doped NiFeCo oxyhydroxide (S-NiFeCo/NF) was synthesized via galvanic corrosion and hydrothermal methods to enhance HER activity. Sulfur incorporation modulated the electronic structure, lowering the onset potential ( − 115&#xa0;mV at − 10&#xa0;mA/cm<sup>2</sup>) and activation barrier (56&#xa0;kJ/mol). S-NiFeCo/NF also demonstrated excellent durability, 0.13&#xa0;mV/h degradation of its initial activity after 400&#xa0;h at – 100&#xa0;mA/cm<sup>2</sup>, highlighting sulfur doping as an effective strategy for non-precious HER electrocatalysts.</p>

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Enhanced Hydrogen Evolution Reaction Kinetics by Sulfur Incorporation in Transition Metal-Based Oxyhydroxide Electrodes

  • 期刊论文

  • 发表日期：

    2025年8月6日

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  • Jun Seok Ha,
  • Seung Hun Lee,
  • Sung Jun Lee,
  • In Tae Kim,
  • Seo Hyun Park,
  • Woo Jae Lee,
  • Kyeong-Ho Kim,
  • Geon Hwee Kim,
  • Jooyoung Lee,
  • Yangdo Kim,
  • Sung Mook Choi,
  • Yoo Sei Park

摘要

Hydrogen, with its high energy density and sustainability, is a promising energy carrier, and water electrolysis provides an efficient, carbon-free method for its production. To achieve cost-effective hydrogen production, the development of transition metal-based HER catalysts is crucial. In this study, sulfur-doped NiFeCo oxyhydroxide (S-NiFeCo/NF) was synthesized via galvanic corrosion and hydrothermal methods to enhance HER activity. Sulfur incorporation modulated the electronic structure, lowering the onset potential ( − 115 mV at − 10 mA/cm2) and activation barrier (56 kJ/mol). S-NiFeCo/NF also demonstrated excellent durability, 0.13 mV/h degradation of its initial activity after 400 h at – 100 mA/cm2, highlighting sulfur doping as an effective strategy for non-precious HER electrocatalysts.